After clicking on the above link you should see the first page of the presentation entitled "Welcome". At this point use only the four keys which on my computer are named PgDn , PgUp, End, and Home. Use the back arrow of your browser only if you wish to terminate the viewing of the presentation.
Investigate your keyboard Feel free to be curious, clicking here does not do any harm but will give me some information about your key board and might help to analyze the problem of viewing the presentation.
Contact the Chambersburg ChapterLast revised: 04/23/17